textspan.h

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#pragma once
 
#include "geom.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define GV_TEXTFONT_FLAGS_WIDTH 7
 
/* Bold, Italic, Underline, Sup, Sub, Strike */
/* Stored in textfont_t.flags, which is GV_TEXTFONT_FLAGS_WIDTH bits, so full */
/* Probably should be moved to textspan_t */
#define HTML_BF (1 << 0)
#define HTML_IF (1 << 1)
#define HTML_UL (1 << 2)
#define HTML_SUP (1 << 3)
#define HTML_SUB (1 << 4)
#define HTML_S (1 << 5)
#define HTML_OL (1 << 6)
 
typedef struct _PostscriptAlias {
  char *name;
  char *family;
  char *weight;
  char *stretch;
  char *style;
  int xfig_code;
  char *svg_font_family;
  char *svg_font_weight;
  char *svg_font_style;
} PostscriptAlias;
 
/* font information
 * If name or color is NULL, or size < 0, that attribute
 * is unspecified.
 */
typedef struct {
  char *name;
  char *color;
  PostscriptAlias *postscript_alias;
  double size;
  unsigned int flags
      : GV_TEXTFONT_FLAGS_WIDTH; // HTML_UL, HTML_IF, HTML_BF, etc.
  unsigned int cnt : (sizeof(unsigned int) * 8 - GV_TEXTFONT_FLAGS_WIDTH);
} textfont_t;
 
/* atomic unit of text emitted using a single htmlfont_t */
typedef struct {
  char *str; /* stored in utf-8 */
  textfont_t *font;
  void *layout;
  void (*free_layout)(void *layout); /* FIXME - this is ugly */
  double yoffset_layout, yoffset_centerline;
  pointf size;
  char just; 
} textspan_t;
 
#ifdef __cplusplus
}
#endif